Cast highestEnclosingNodeOfType() return value to tighter type

Source/core/editing/EditingStyle.cpp

 /*
  * Copyright (C) 2007, 2008, 2009 Apple Computer, Inc.
  * Copyright (C) 2010, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1049 matching lines @@
 
 PassRefPtrWillBeRawPtr<EditingStyle> EditingStyle::wrappingStyleForSerialization(Node* context, bool shouldAnnotate)
 {
     RefPtrWillBeRawPtr<EditingStyle> wrappingStyle = nullptr;
     if (shouldAnnotate) {
         wrappingStyle = EditingStyle::create(context, EditingStyle::EditingPropertiesInEffect);
 
         // Styles that Mail blockquotes contribute should only be placed on the Mail blockquote,
         // to help us differentiate those styles from ones that the user has applied.
         // This helps us get the color of content pasted into blockquotes right.
-        wrappingStyle->removeStyleAddedByNode(enclosingNodeOfType(firstPositionInOrBeforeNode(context), isMailBlockquote, CanCrossEditingBoundary));
+        wrappingStyle->removeStyleAddedByNode(enclosingNodeOfType(firstPositionInOrBeforeNode(context), isMailHTMLBlockquoteElement, CanCrossEditingBoundary));
 
         // Call collapseTextDecorationProperties first or otherwise it'll copy the value over from in-effect to text-decorations.
         wrappingStyle->collapseTextDecorationProperties();
 
         return wrappingStyle.release();
     }
 
     wrappingStyle = EditingStyle::create();
 
     // When not annotating for interchange, we only preserve inline style declarations.
     for (Node* node = context; node && !node->isDocumentNode(); node = node->parentNode()) {
-        if (node->isStyledElement() && !isMailBlockquote(node)) {
+        if (node->isStyledElement() && !isMailHTMLBlockquoteElement(node)) {
             wrappingStyle->mergeInlineAndImplicitStyleOfElement(toElement(node), EditingStyle::DoNotOverrideValues,
                 EditingStyle::EditingPropertiesInEffect);
         }
     }
 
     return wrappingStyle.release();
 }
 
 
 static void mergeTextDecorationValues(CSSValueList* mergedValue, const CSSValueList* valueToMerge)
@@ skipping 583 matching lines @@
 {
     for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
         RefPtrWillBeRawPtr<CSSComputedStyleDeclaration> ancestorStyle = CSSComputedStyleDeclaration::create(ancestor);
         if (!hasTransparentBackgroundColor(ancestorStyle.get()))
             return ancestorStyle->getPropertyCSSValue(CSSPropertyBackgroundColor);
     }
     return nullptr;
 }
 
 }